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    <code style="background: red;">===</code> 和非严格的比较操作符 <code>==</code>，以及&nbsp;<a
        href="/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Object/is"><code>Object.is()</code></a>
    方法。
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        <strong>JavaScript&nbsp;(&nbsp;</strong><a href="/zh-CN/docs/Glossary/First-class_Function">函数优先</a>的轻量级<a
            class="external" href="https://en.wikipedia.org/wiki/JavaScript#Uses_outside_Web_pages"
            rel=" noopener">非浏览器环境</a>
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